Tight container



Oct. 4, 1955 A. GISIGER 2,719,403

TIGHT CONTAINER FiledJuly 1, 1952 INVENTOR Armin fiisiger ATTORNEYUnited States Patent TIGHT CONTAINER Armin Gisiger, Selzach, SwitzerlandApplication July 1, 1952, Serial No. 296,606

Claims priority, application Switzerland July 14, 1951 8 Claims. (Cl.58-90) This invention relates to tight containers comprising a containerbody and a closing member having a collar to be fixed detachably to thecontainer body.

The container according to the invention is characterised in that thesaid closing member is thinned in a zone inside said collar in order toguarantee elasticity of the collar and to obtain a pressure. fit betweensaid body and said member.

Other objects and features will be apparent as the following descriptionproceeds, reference being had. to the accompanying drawing which, by wayof example, illustrates one embodiment of my invention, and wherein thesingle figure represents an axial section of this embodiment in theshape of a watchcase.

The case shown in the drawing comprises a body 1 forming the watchcrystal, a closing member 2 forming the back of the case, and a combinedbezel and center 3. The crystal 1 has the shape of a bell whose wall 4extends axially all over the height of the watch movement 5 and touchesthe back 2 as at 6.

Inside its outer circumference the back 2 has a collar 7 the outercircumference of which has a head 8 snappingly engaged in an innergroove 9 of the crystal wall 4. The shape of the groove 9 is exactlyadjusted to the shape of the bead 8. The surfaces engaging each otherhave been machined and polished very finely in order to guarantee goodtightness against penetration of liquid, gases and solid substances.

The back 2 is thinned in a zone 10 lying inside the collar 7 in order toguarantee elasticity of the collar 7 and, in consequence, to obtain astrong and uniform pressure exerted by the bead 8 on the groove 9, afact which adds to the tightness of the joint.

The combined bezel and center 3 is held fast on the crystal by means ofa double snap fixing means. The crystal comprises a depression 11 inwhich the upper end of the combined bezel and center 3 is engaged.Besides this, the wall 4 has a projection or bead 12 engaging acorrespondingly shaped groove of the center 3.

The combined bezel and center 3 comprises a cylindrical wall and anupper truncated cone portion 15. The wall of the crystal comprises theproper wall 4 and an upper truncated cone portion 13. The combined bezeland center 3 is applied against the crystal Wall, its truncated coneportion being applied against the portion 13 of the crystal, so that therim of the dial 14 engaging the lower face of the portion 13 is hiddenfrom view by the portion 15 of the combined bezel and center 3.

When the watch movement has relatively small dimensions, as is the casein the illustrated example, a casing frame 16 carrying the movement 5 isadjusted inside the crystal wall 4. In the drawing, this frame 16 has aprojection or head 17 engaging a correspondingly shaped groove of thewall 4. The wall 4 is thus slightly thinned in the region of this grooveso that a certain elasticity of the lower portion of the wall 4 isguaranteed and assembling the case thereby facilitated.

The winding stem 18 traverses freely the center 3, the

wall 4 and the frame 16. A washer 19 such as of rubber, for instance,lies in a lodging provided partially in the crystal and partially in thecenter, and embraces tightly the winding. stem 18. Instead of using theWasher 19 the stem 18 may be provided with a watertight crown.

The back 2 hasa radial extension 20 to make the back 2 flush with thecenter 3.

When assembling. the shown and described watchcase, the frame 16comprising the watch movement 5 is at first inserted into the crystal 1(snap fixing 17). Afterwards, the combined bezel and center- 3 is putonto the crystal 1, the member 3 being thereby snappingly fixed to thecrystal as at 11 and 12. Finally, the back 2 is brought into placewhereby its collar 7 snappingly engages the crystal wall 4 as at 8, 9.In order to take the case to pieces, a knife or the like is insertedinto the joint 21 thereby separating the center 3 from the extension 20of the back 2, so that the latter can be removed. Afterwards, the lowerportion of the crystal wall 4 is radially compressed in order to removethe combined bezel and center 3. Finally, by radially extending the wall4, the casing frame 16 and the watch movement 5 can easily be taken outof the crystal.

The bead 8 may also be provided on the wall 4 and the correspondinggroove 9 on the collar 7 of the back 2.

. Instead of a watchcase, the novel container may for instance be aconserve box for storing victuals or any other kind of waterand/ orgastight and/or dustproof container.

While I have described and shown one embodiment of my invention I do notwish to unnecessarily limit the scope of my invention to thisembodiment, but reserve the right to make such modifications andrearrangements of the several parts as may come within the purview ofthe accompanying claims.

What I claim is:

l. A generally cylindrically shaped container comprising a containerbody forming one end and the sidewall of the container, at closingmember forming the other end of the container, locking means removablysecuring the closing member in engagement with the container, an aunulararea of reduced section forming part of the closing member end, and acenter portion thicker than said annular section forming part of theclosing member end, the edge of the closing member adapted to beyieldingly pressed inwardly facilitating the engagement of the lockmgmeans.

2. A generally cylindrically shaped container comprising a containerbody forming one end and the sidewall of the container, locking means,and a closing member forming the other end of the container andremovably held in closing relationship with the container by the lockingmeans, the closing member having a thinned annular zone between twothicker zones, the edge of the closing member adapted to be yieldinglypressed inwardly facilitating the engagement of the locking means.

3. A generally cylindrically shaped container comprising a containerbody forming one end and the sidewall of the container, a closing memberforming the other end of the container, surfaces of the body and closingmember cooperating with each other, means forming a bead on one of saidlast-mentioned members, means forming a groove on the other of thelast-mentioned members, the groove practically exactly adjusted to theshape of the bead, an annular area of reduced section forming part ofthe closing member end, and a center portion of the closing member endthicker than said annular section, the edge of the closing memberadapted to be yieldingly pressed inwardly facilitating the engagement ofthe bead in the groove, whereby a snap action assembly is had of thebody and closing member.

4. A watchcase comprising a bell-shaped crystal, a

back, a collar extending from the back and snappingly engaged with theinner surface of the crystal wall, and a thinned annular zone betweentwo thicker zones of the back whereby a snap assembly is had of thecrystal and back, the edge of the back adapted to be yieldingly pressedinwardly facilitating the engagement of the collar with the innersurface of the crystal-wall.

5. A watchcase comprising a bell-shaped crystal, a back, a collarextending from the back and snappingly engaged with the inner surface ofthe crystal wall, a thinned annular zone between two thicker zones ofthe back for a snap assembly, a combined bezel and center, and atruncated cone portion of the combined bezel and center for hiding fromview the rim of a watch dial to be inserted in the case, the crystal inbeaded engagement with the collar and the combined bezel and center inbeaded engagement with the crystal.

6. A watchcase comprising a bell-shaped crystal having a groove on itsinner wall positioned adjacent the edge and a bead on its outer wallpositioned opposite to the groove, a back, a collar extending from theback and having a bead on its outer surface to engage the groove in thecrystal, 2. combined bezel and center having a groove on its inner wallpositioned adjacent one end to receive the crystal bead, and a truncatedcone portion of the combined bezel and center for hiding from view therim of a watch dial to be inserted in the case.

7. A watchcase comprising a bell-shaped crystal having a groove on itsinner wall positioned adjacent the edge and a bead on its outer wallpositioned opposite to the groove, a back, a collar extending from theback and having a bead on its outer surface to engage the groove in thecrystal, a combined bezel and center having a groove on its inner wallpositioned adjacent one end to receive the crystal bead, a truncatedcone portion of the combined bezel and center for hiding from view therim of a watch dial to be inserted in the case, and a thinned annularzone between two thicker zones of the back.

8. A container comprising a wall, a detachable closing member, andlocking means securing the closing member in closing relationship withthe wall, the closing member having an annular thinned zone positionedinwardly of its edge, the edge of the closing member adapted to beyieldingly pressed inwardly facilitating the engagement of the lockingmeans securing the closing member in closing relationship with the wall.

References Cited in the file of this patent FOREIGN PATENTS 207,453Switzerland Feb. 1, 1940 207,664 Switzerland Feb. 16, 1940 211,335Switzerland Dec. 2, 1940 224,250 Switzerland Feb. 1, 1943 229,648Switzerland Feb. 1, 1944 232,164 Switzerland Aug. 1, 1944 250,010Switzerland May 1, 1948 253,751 Switzerland Nov. 16, 1948 274,905Switzerland July 16, 1951

